Accepting the risk that other people might misbehave is price of
freedom.
Do you want a General Purpose Computer? Or do you want an appliance that is ultimately controlled by someone else, where you have to get permission[1] if you want to use it in any way that wasn't pre-aproved? What are the odds that the things you want to do will continue to be approved when you ask for permission next year? Or ten years from now?
If someone can restrict how you use your device, you then they are de facto the actual owner of the device. Do you want to own the products[2] you buy, or do you want a future where property rights are rare and you have to lease everything?
The War On General Purpose Computing continues, and the people that wish the Turing machine could be stuffed back in its bottle have been wining small but important battles over the last few years. Apple deserves a lot of blame here, as the walled garden was previously limited to stuff like game consoles, but the the big problem has been the many developers that chose shiny tech, promises of easy development, end-user convenience, and short-term profit over the freedom to tinker with products you actually own.
Of course there will be costs and risks. Fighting this trend toward walled gardens, like any war, will probably require certain sacrifices. I suggest paying those costs now, as price of freedom will only increase.
[1] https://www.fourmilab.ch/documents/digital-imprimatur/ (note: this is originally about publication, but the ideas apply similarly to the War On General Purpose Computing. Also, consider when the essay was written; some technology has changed, but the basic idea is still important)
[2] Many products, not just your "phone" (portable computer). Just look at the rush to throw a CPU and 802.11 PHY into absolutely everything. There are many example, but the current attempt by John Deere ( http://ifixit.org/blog/7192/john-deere-mess/ ) to circumvent the "first-sale doctrine" is a perfect example of what is going to happen to most products if we give up ownership.